fix: satisfy clippy 1.97 lints failing on CI

- sanitize_current_ratio: and_then if/else -> filter
- screener/graph sorts: sort_by with reversed cmp -> sort_by_key(Reverse)
- insert_ksei_holdings_rows: manual Result match -> ?

Fixes the Clippy step on ubuntu-latest (rust 1.97) that the nix
toolchain (1.93.1) did not flag.

src/api/msn/map.rs

@@ -184,13 +184,7 @@ fn normalize_percentish(value: Option<f64>) -> Option<f64> {
 }
 
 fn sanitize_current_ratio(value: Option<f64>) -> Option<f64> {
-    value.and_then(|number| {
-        if !number.is_finite() || number < 0.01 {
-            None
-        } else {
-            Some(number)
-        }
-    })
+    value.filter(|number| number.is_finite() && *number >= 0.01)
 }
 
 fn round_price(value: f64) -> i64 {

src/cli/stocks.rs

@@ -983,10 +983,10 @@ fn sort_screener_quotes(quotes: &mut [Quote], filter: &str) {
             });
         }
         "high-volume" => {
-            quotes.sort_by(|a, b| b.volume.cmp(&a.volume));
+            quotes.sort_by_key(|quote| std::cmp::Reverse(quote.volume));
         }
         "large-cap" => {
-            quotes.sort_by(|a, b| b.market_cap.unwrap_or(0).cmp(&a.market_cap.unwrap_or(0)));
+            quotes.sort_by_key(|quote| std::cmp::Reverse(quote.market_cap.unwrap_or(0)));
         }
         _ => {}
     }

src/ownership/db.rs

@@ -196,10 +196,7 @@ fn insert_ksei_holdings_rows(
             )
             .map_err(|e| IdxError::DatabaseError(e.to_string()));
 
-        match changed {
-            Ok(n) => inserted += n,
-            Err(err) => return Err(err),
-        }
+        inserted += changed?;
     }
 
     Ok(inserted)

src/ownership/graph.rs

@@ -122,7 +122,7 @@ pub fn format_graph_text(nodes: &[GraphNode], edges: &[GraphEdge]) -> String {
     out.push_str(&format!("nodes: {}  edges: {}\n", nodes.len(), edges.len()));
 
     for (ticker_id, mut rels) in ticker_to_entities {
-        rels.sort_by(|a, b| b.percentage_bps.cmp(&a.percentage_bps));
+        rels.sort_by_key(|edge| std::cmp::Reverse(edge.percentage_bps));
         let ticker_label = labels.get(ticker_id).map(|v| v.0).unwrap_or(ticker_id);
         out.push_str(&format!("\n{ticker_label} [TICKER]\n"));